64 lines
2.1 KiB
JavaScript
64 lines
2.1 KiB
JavaScript
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import { Subscriber } from '../Subscriber';
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/**
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* Returns an Observable that emits whether or not every item of the source satisfies the condition specified.
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*
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* @example <caption>A simple example emitting true if all elements are less than 5, false otherwise</caption>
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* Observable.of(1, 2, 3, 4, 5, 6)
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* .every(x => x < 5)
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* .subscribe(x => console.log(x)); // -> false
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*
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* @param {function} predicate A function for determining if an item meets a specified condition.
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* @param {any} [thisArg] Optional object to use for `this` in the callback.
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* @return {Observable} An Observable of booleans that determines if all items of the source Observable meet the condition specified.
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* @method every
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* @owner Observable
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*/
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export function every(predicate, thisArg) {
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return (source) => source.lift(new EveryOperator(predicate, thisArg, source));
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}
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class EveryOperator {
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constructor(predicate, thisArg, source) {
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this.predicate = predicate;
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this.thisArg = thisArg;
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this.source = source;
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}
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call(observer, source) {
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return source.subscribe(new EverySubscriber(observer, this.predicate, this.thisArg, this.source));
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}
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}
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @ignore
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* @extends {Ignored}
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*/
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class EverySubscriber extends Subscriber {
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constructor(destination, predicate, thisArg, source) {
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super(destination);
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this.predicate = predicate;
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this.thisArg = thisArg;
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this.source = source;
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this.index = 0;
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this.thisArg = thisArg || this;
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}
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notifyComplete(everyValueMatch) {
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this.destination.next(everyValueMatch);
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this.destination.complete();
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}
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_next(value) {
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let result = false;
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try {
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result = this.predicate.call(this.thisArg, value, this.index++, this.source);
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}
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catch (err) {
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this.destination.error(err);
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return;
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}
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if (!result) {
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this.notifyComplete(false);
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}
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}
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_complete() {
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this.notifyComplete(true);
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}
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}
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//# sourceMappingURL=every.js.map
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